Electronic facial tracking and detection system and method and a

Details Electronic facial tracking and detection system and method and a Electronic facial tracking and detection system and method and a

1985-06-03

1990-12-04

Shaw, Dale M.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

382 2, G10L 708, G06K 900

Patent

active

049759604

ABSTRACT:
The apparatus includes circuitry for obtaining a video image of an individual's face, circuitry for electronically locating and tracking a first feature, such as the nostrils, of the facial image for use as reference coordinates and circuitry responsive to the reference coordinates for locating and tracking a second facial feature, such as the mouth, of the facial image with respect to the first feature. By tracking the location of the nostrils, the apparatus can follow the movement of the mouth, and thereby automatically recognize speech. In a preferred embodiment, the video image is grayscale encoded and the raster lines are smoothed to eliminate noise. The transitions between gray levels of the smoothed image are encoded and the resulting transition code is used to form a contour map of the image from which region parameters are computed which can be compared against stored speech templates to recognize speech. In the preferred embodiment, acoustic speech recognition is combined with visual speech recognition to improve accuracy.

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